<?php // $Id: _parse_proppatch.php,v 1.1.2.2 2008/02/27 02:50:22 martinlanghoff Exp $
/*
   +----------------------------------------------------------------------+
   | Copyright (c) 2002-2007 Christian Stocker, Hartmut Holzgraefe		|
   | All rights reserved												  |
   |																	  |
   | Redistribution and use in source and binary forms, with or without   |
   | modification, are permitted provided that the following conditions   |
   | are met:															 |
   |																	  |
   | 1. Redistributions of source code must retain the above copyright	|
   |	notice, this list of conditions and the following disclaimer.	 |
   | 2. Redistributions in binary form must reproduce the above copyright |
   |	notice, this list of conditions and the following disclaimer in   |
   |	the documentation and/or other materials provided with the		|
   |	distribution.													 |
   | 3. The names of the authors may not be used to endorse or promote	|
   |	products derived from this software without specific prior		|
   |	written permission.											   |
   |																	  |
   | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
   | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	|
   | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS	|
   | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE	   |
   | COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,  |
   | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
   | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;	 |
   | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER	 |
   | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT   |
   | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN	|
   | ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE	  |
   | POSSIBILITY OF SUCH DAMAGE.										  |
   +----------------------------------------------------------------------+
*/


/**
 * helper class for parsing PROPPATCH request bodies
 * 
 * @package HTTP_WebDAV_Server
 * @author Hartmut Holzgraefe <hholzgra@php.net>
 * @version @package-version@
 */
class _parse_proppatch 
{
	/**
	 *
	 * 
	 * @var
	 * @access
	 */
	var $success;

	/**
	 *
	 * 
	 * @var
	 * @access
	 */
	var $props;

	/**
	 *
	 * 
	 * @var
	 * @access
	 */
	var $depth;

	/**
	 *
	 * 
	 * @var
	 * @access
	 */
	var $mode;

	/**
	 *
	 * 
	 * @var
	 * @access
	 */
	var $current;

	/**
	 * constructor
	 * 
	 * @param  string  path of input stream 
	 * @access public
	 */
	function _parse_proppatch($path) 
	{
		$this->success = true;

		$this->depth = 0;
		$this->props = array();
		$had_input = false;

		$f_in = fopen($path, "r");
		if (!$f_in) {
			$this->success = false;
			return;
		}

		$xml_parser = xml_parser_create_ns("UTF-8", " ");

		xml_set_element_handler($xml_parser,
								array(&$this, "_startElement"),
								array(&$this, "_endElement"));

		xml_set_character_data_handler($xml_parser,
									   array(&$this, "_data"));

		xml_parser_set_option($xml_parser,
							  XML_OPTION_CASE_FOLDING, false);

		while($this->success && !feof($f_in)) {
			$line = fgets($f_in);
			if (is_string($line)) {
				$had_input = true;
				$this->success &= xml_parse($xml_parser, $line, false);
			}
		} 
		
		if($had_input) {
			$this->success &= xml_parse($xml_parser, "", true);
		}

		xml_parser_free($xml_parser);

		fclose($f_in);
	}

	/**
	 * tag start handler
	 *
	 * @param  resource  parser
	 * @param  string	tag name
	 * @param  array	 tag attributes
	 * @return void
	 * @access private
	 */
	function _startElement($parser, $name, $attrs) 
	{
		if (strstr($name, " ")) {
			list($ns, $tag) = explode(" ", $name);
			if ($ns == "")
				$this->success = false;
		} else {
			$ns = "";
			$tag = $name;
		}

		if ($this->depth == 1) {
			$this->mode = $tag;
		} 

		if ($this->depth == 3) {
			$prop = array("name" => $tag);
			$this->current = array("name" => $tag, "ns" => $ns, "status"=> 200);
			if ($this->mode == "set") {
				$this->current["val"] = "";	 // default set val
			}
		}

		if ($this->depth >= 4) {
			$this->current["val"] .= "<$tag";
			if (isset($attr)) {
				foreach ($attr as $key => $val) {
					$this->current["val"] .= ' '.$key.'="'.str_replace('"','&quot;', $val).'"';
				}
			}
			$this->current["val"] .= ">";
		}

		

		$this->depth++;
	}

	/**
	 * tag end handler
	 *
	 * @param  resource  parser
	 * @param  string	tag name
	 * @return void
	 * @access private
	 */
	function _endElement($parser, $name) 
	{
		if (strstr($name, " ")) {
			list($ns, $tag) = explode(" ", $name);
			if ($ns == "")
				$this->success = false;
		} else {
			$ns = "";
			$tag = $name;
		}

		$this->depth--;

		if ($this->depth >= 4) {
			$this->current["val"] .= "</$tag>";
		}

		if ($this->depth == 3) {
			if (isset($this->current)) {
				$this->props[] = $this->current;
				unset($this->current);
			}
		}
	}

	/**
	 * input data handler
	 *
	 * @param  resource  parser
	 * @param  string	data
	 * @return void
	 * @access private
	 */
	function _data($parser, $data) 
	{
		if (isset($this->current)) {
			$this->current["val"] .= $data;
		}
	}
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * indent-tabs-mode:nil
 * End:
 */
